​​Are you also worried about buying a reliable LED large screen, but the more you read the information online, the more you become confused?​​ Yesterday, a boss who opened a shopping mall complained to me that the screen I bought for 300,000 yuan had a color block after half a year of use, and the repair fee was more expensive than buying a new screen. In fact, choosing a large LED screen is like finding a partner.​Choose the right channel is more important than bargaining​​！

​​1. Don’t step on the three major areas of crashes!​​
Last year, a chain supermarket purchased 20 indoor screens, but the brightness attenuation occurred within 11 of them within half a year. Disassembly found:72% of the fault screens come from informal channels​. Beware of these tricks:

• ​​E-commerce platform special discount machine​(It is actually a project final product or refurbished piece)
• ​​Manufacturer direct sales live broadcast room​​(May encounter an OEM factory)
• ​Second-hand equipment trading market​(Hidden repaired scrap screen)

► ​Key indicator verification method​: Requesting suppliers to provide

1. Third-party testing report (focus on color gamut coverage rate ≥120% NTSC)
2. Aging test video (record for 72 hours of continuous playback)
3. Module batch consistency certificate (color difference tolerance ΔE≤3)

​​2. Comparison table of gold procurement channels​​

​​Measured cases​: The organizer of a music festival saved 60% of the initial investment through the rental channel, and was able to flexibly increase and decrease the number of screens according to the scale of the event.

​​3. Inspection tips that experts use​​

1. ​​Night black screen detection method​: After turning off the light, you can observe 30cm away from the screen. The high-quality screen should have no highlights or dark spots.
2. ​Gradient color test​: Play a 256-level grayscale gradient diagram, and the color block fault will appear on the low-end screen
3. ​Temperature difference challenge test​: After 2 hours of turning on the machine, use the back of your hand to contact the surrounding area of ​​the heat dissipation hole, and choose carefully at the temperature >55℃.

A boss who runs a gym told me that he specializes in playing high-speed sports football match videos during inspections.​Screen with a refresh rate of ≥1920Hz can ensure that the screen does not drag.​。

​​4. Hidden terms that 90% of novices ignore​
Be sure to confirm these details when signing a contract:

• ​​Brightness attenuation compensation​(October attenuation rate ≤5% per year)
• ​Modular replacement promise​(Support single point of maintenance without changing the entire screen)
• ​​Software Upgrade Service(At least 3 years of system updates are provided)

Don't be fooled by the guise of "lifetime warranty". Many merchants call warranty​Only protect the lamp beads but not the driver, the labor cost must be calculated separately​​！

I recently discovered an interesting phenomenon: a purchasing manager who truly understands his career,​Screen selection time is 3 times more than bargaining time​. I have to say that this LED large screen is like a house - location (installation location) determines the effect, and property (after-sales service) determines the life span. Next time you see a quotation, don’t just stare at the zero behind the number and ask more, “Can this screen withstand the rainy season?” It is guaranteed that the suppliers will not dare to fool you!

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